Evaporator



March 5, 1935. SLAGEL EVAPORATOR Filed Dec. 31, 1951 Patented Mar. 5, 1935 EVAPQRATOR Franklin G. Slagel, Buffalo, N. Y, assignor to Eedders Manufacturing lilompany, line, Buti'alo, N. Y., a corporation of New York Application December 31, 1931, Serial No. 584,211

6 Claims.

This invention relates to mechanical refrigcrating systems and more particularly to evaporaters.

An object of my invention is to provide a new a and novel form of sheet metal evaporator.

Another object of my invention is to provide a sheet metal evaporator which can be economically formed and assembled.

A further object of my invention is to provide a header and chamber forming housing which are associated in a novel manner to form a leak-proof refrigerant circulating system.

Still another object of my invention resides in forming a storage chamber with a housing having a plurality of refrigerant duct loops arranged in groups each having an individual connection with the header.

Other objects of the invention will appear from the following description taken in connection with the drawing, which forms a part of the specification, and in which:

Fig. l is a side elevational view of an evaporator incorporating my invention.

Fig. 2 is a sectional view of the same taken on line 2--2 of Fig. 1.

Fig. 3 is a plan view of the chamber forming housing with the header removed therefrom.

Fig. ii is a fragmentary view of the manifold portion of the inner wall of the chamber forming housing.

Referring now to the drawing by characters of reference, 10 represents the header and 11 the chamber forming housing of anevaporator which is adapted to be connected in a circuit with a condenser and a compressor (not shown) in the conventional manner.

The header is constructed preferably of sheet metal and is in the form of a cylinder. The housing forming the storage chamber is also formed of sheet metal and consists preferably of only two sheets 12 and 13. The outer sheet of material is formed along two opposite ends with a pressed out rib 14 which forms manifolds, and extending normal to the manifolds are aligned pressed out ribs 15 and 16. Every three of such aligned ribs are grouped adjacent the central portion of the sheet and the ends of the aligned ribs terminate short of each other.

The inner sheet is substantiallly the same in outline as the outer sheet, however it is longer in one direction so that the ends 46 can be folded around the ends of the outer sheet of material and seam welded therewith, as indicated at 17. The inner sheet is formed with three depressed portions 18 to provide manifolds for the ends or the groups of aligned ribs 15 and 16 formed in the outer sheet; The sheets are welded together, as indicated at 19, between the groups of ribs and between the individual ribs of each group, and the outer sheet is formed with outwardly projecting flaring necks arranged centrally of the manifolds l8.

The sheets are arranged in parallel relation with the ribs, necks and depressed portions formed therewith, and with theends overlapping the outer sheet in the other direction. The sheets are then welded together aong their abutting surfaces, along the ribs 15 and 16 and then the ends 4 5 are folded around the adjacent ends or" the outer sheet and seam welded the entire length. The sheets are also seam welded together along their entire length adjacent the overlapping edges, as indicated at 21. The sheets are next bent to form an open ended storage chamber which is preferably rectangular. The overlying edges of the sheets are associated to overlap and are spot welded'together along their entire length, as indicated at 22.

The housing provides a storage chamber and a refrigerant duct means around the chamber. The ribs 15 and 16 substantially surround the chamber in spaced relation longitudinally thereof, and communicate with one of the iiolds i l and with one of the manifolds 18. Groups of ducts communicate with each manifold 18 and the necks 20 provide connections between the manifolds 18 and the interior of the header.

The header is formed with three depending necks 24 into which the necks 20 telescope and the ends of the necks 20 are spun over the shoulders do in the header from which the necks 24 depend. The telescoping necks are tin dipped to provide leak proof joints. This spun relation of the necks with the shoulders form rigid connections between the header and the chamber housing.

The inner sheet 12 of the housing is formed with longitudinally extending beads 41 arranged in vertical spaced relation on opposite sides of the chamber for the purpose of providing parallel rails to support trays. These beads form longitudinal- ,ly extending manifolds. communicating with the ribs or ducts 15 and 16 so that the rails are thus directly exposed to refrigerant. Below therear end of the rails, boses 43 are pressed out from the inner sheet 12 and serve as stops for trays which are slid into the housing and supported on the rails.

The evaporator thus formed can be quickly fabricated and assembled at a low cost. The refrigerant circulating system substantially sin-- roimds the storage chamber and due to the mamfolding will promote emcient heat transfer. It will be lmderstood that the evaporator is of the flooded type so that the manifolds and connecting ducts will always be filled with liquid refrigerant, and that the refrigerant moves into and from the housing through the telescoping necks.

Although this invention has been described in connection with certain specific embodiments, the principles involved are susceptible of numerous other applications readilyconceived by persons skilled in the art, and the invention is therefore said housing having necks extending therefrom and communicating with the duct means, said housing necks telescoping into the header necks and being spun therein. i

3. An evaporator comprising a header having a plurality of spaced depending outlet necks, a housinghaving duct means therein, necks extending from the housing and telescoping the header necks, said homing necks communicating with the duct means, and means securing the necks in leak proof relation.

4. In an evaporator for refrigerating systems, a pair of sheets of metal secured together and welded together around the edges, the inner sheet having spaced inwardly pressed portions forming manifolds, the outer sheet having parallel pressed out portions forming manifolds and spaced pressed out ribs communicating with one of the manifolds formed in the same sheet and one of the manifolds in the other sheet, necks pressed from the outer sheet communicating with the manifolds of the inner sheet, and a header with which the necks are fixed and communicate.

5. In an evaporator for refrigeration systems, a header, a pair of sheets of metal secured together and bent to form a storage chamber, one of said sheets having pressed portions forming a plurality of ducts between said sheets, and the outer sheet having an outwardly extending neck portion coming secured to said header and communicating therewith.

6. In an evaporator for refrigeration systems, a header, a pair of sheets of metal-secured together and bent to form a rectilinear storage chamber, one of said sheets having pressed portions forming a plurality of spaced ducts between the sheets, said ducts having their extremities terminating in the upper and lower walls of the rectilinear chamber, manifolds formed in one of the sheets and connecting the extremities of groups of ducts in the upper wall of the chamber, and protruding neck portions formed in one of the sheets and each communicating with a manifold, said neck portions being secured to said header and communicating therewith.

FRANKLIN G. SLAGEL.

-municating with said ducts, said neck portion be- 

